EP2455600A1 - Procédé et dispositif de commande d'une soupape d'injection - Google Patents

Procédé et dispositif de commande d'une soupape d'injection Download PDF

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Publication number
EP2455600A1
EP2455600A1 EP10191465A EP10191465A EP2455600A1 EP 2455600 A1 EP2455600 A1 EP 2455600A1 EP 10191465 A EP10191465 A EP 10191465A EP 10191465 A EP10191465 A EP 10191465A EP 2455600 A1 EP2455600 A1 EP 2455600A1
Authority
EP
European Patent Office
Prior art keywords
actuator unit
voltage characteristic
unit voltage
valve needle
closing position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10191465A
Other languages
German (de)
English (en)
Inventor
Marco Omeri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to EP10191465A priority Critical patent/EP2455600A1/fr
Publication of EP2455600A1 publication Critical patent/EP2455600A1/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time

Definitions

  • the invention relates to a method and an apparatus for operating an injection valve.
  • Injection valves are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose fluid into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine.
  • the object of the invention is to provide a method and an apparatus for operating an injection valve which contribute to a reliable and precise function of the injection valve.
  • the invention is distinguished by a method and a corresponding apparatus to operate an injection valve.
  • the injection valve comprises a valve needle preventing a fluid flow out of an injection nozzle in a closing position and enabling the fluid flow of the injection nozzle apart from the closing position.
  • the injection valve comprises an electro-magnetic actuator unit being designed to actuate the valve needle.
  • the actuator unit is activated according to a predetermined activation signal with a given activation period for effecting a fluid flow out of the injection nozzle.
  • An actuator unit voltage characteristic is captured at least over a period of time during which the valve needle could reach the closing position.
  • a closing time is determined representing a time when the valve needle reaches the closing position.
  • the actuator unit is activated by the predetermined activation signal. Therefore the actuator unit may be controlled by a drive unit.
  • the amount of injected fluid depends on the pulse or signal shape and the activation period of the activation signal.
  • the activation period is a preferred parameter for controlling the amount and/or flow rate of injected fluid.
  • the activation period characterizes a complete control time that could be divided in different phases according given requirements. But for a precise dosing of the fluid it is advantageous to know the time the valve needle effectively reaches the closing position. For instance, the injection valve is indeed calibrated when new to correlate the activation signal with the amount of fluid injected.
  • a closing period representing a time period between an end of the activation period and the time the valve needle reaches the closing position, of a particular injector valve can vary, which can affect the estimation of the flow rate and/or the amount of fluid injected.
  • a variation of the closing period for a particular injector valve becomes especially relevant, if the closing period becomes of the same order of the activation period.
  • the actuator unit may comprise an armature and a coil.
  • a core may be assigned to the actuator unit.
  • the coil and the core form an electromagnet.
  • the core may be formed by an inlet tube.
  • there may be other elements guiding and/or amplifying a magnetic field induced by the coil like a valve body and/or a housing and/or the armature.
  • the actuator unit and the other elements guiding and/or amplifying a magnetic field induced by the coil form an electro-magnetic circuit.
  • An electrical behaviour of this electro-magnetic circuit can be characterized by the actuator unit voltage.
  • the actuator unit voltage characteristic can be measured by a voltage sensor.
  • There may be additional and/or other components guiding and/or amplifying the magnetic field induced by the coil and therefore may be additionally or alternatively be considered in the electro-magnetic circuit.
  • the magnetic field induced by the coil is controlled by the activation signal.
  • the armature is directly controlled by the activation signal during the activation period.
  • this force coupling is interrupted and there is a transient phase during which the actuator unit voltage characteristic returns to zero.
  • the armature and other with the armature mechanically coupled components move themselves depending upon their inertia and/or a mechanic condition and/or a hydraulic condition to close the injector. But there is still some energy stored in the electromagnetic circuit.
  • the electromagnetic circuit is discharged and the actuator unit voltage characteristic returns to zero.
  • a second temporal derivate of the actuator unit voltage characteristic is determined.
  • the closing time is determined.
  • the closing time is determined in correlation with a first zero crossing of the second temporal derivate of the actuator unit voltage characteristic.
  • a smoothed actuator unit voltage characteristic is determined by at least filtering the actuator unit voltage characteristic once with a smoothing filter. Furthermore the second temporal derivate of the smoothed actuator unit voltage characteristic is determined and depending on this second temporal derivate the closing time is determined. In this way noise related to the system and/or to external noise sources can be eliminated and subsequent processing and/or calculation steps can be simplified.
  • the smoothing filter is designed to determine for a respective value of the captured actuator unit voltage characteristic or a pre-processed actuator unit voltage characteristic an average value or a weighted average value depending on the value itself and a given second number of respective previous and subsequent values. High frequency signal parts, typical for noise, can be sub-pressed by such an averaging. It is possible to measure the actuator unit voltage by sampling the actuator unit voltage by given sampling instances.
  • a first number of filter cycles is defined depending on the actuator unit voltage characteristic and/or how it is captured. This has the advantage that depending on a particular application the filtering procedure can be repeated several times, for instance, until high frequency signal parts disappear which are typical for noise.
  • the second number of respective previous and subsequent values is defined depending on the captured actuator unit voltage characteristic and/or how it is captured.
  • an additional parameter is available for optimizing the filtering procedure according to predefined requirements.
  • An injection valve 100 ( figure 1 ), that is particular suitable for dosing fuel into an internal combustion engine, comprises e. g. a valve assembly 11 and an inlet tube 12.
  • the valve assembly 11 comprises a valve body 14 with a central longitudinal axis L and a housing 16.
  • the housing 16 is partially arranged around the valve body 14. Furthermore a cavity 18 is arranged in the valve body 14.
  • the cavity 18 takes in a valve needle 20, an armature 22 and in this particular case a damper element, e. g. a damper spring 46.
  • the damper spring 46 forms a soft stop element for the armature 22.
  • the armature 22 has an upper guide 24 formed as a collar around the valve needle 20. The upper guide 24 is mechanically coupled with the valve needle 22.
  • a calibration spring 28 is arranged in a recess 26 provided in the inlet tube 12.
  • the valve needle 20 comprises, for example, a valve needle body and a sealing element.
  • the sealing element is mechanically coupled with the valve needle body.
  • the valve needle body preferably has a cylindrical shape.
  • the sealing element has for example a spherical shape. Alternatively, the sealing element can have a conical shape.
  • the sealing element rests on a seat preventing a fluid flow through at least one injection nozzle of the injection valve 100.
  • the injection nozzle may be, for example, an injection hole. However, it may also be of some other type suitable for dosing fluid.
  • the sealing element permits the fluid injection into the combustion chamber in further positions, i. e. when it does not rest on the seat. The further positions represent non-closing positions.
  • the valve assembly 11 is provided with an actuator unit 36 which is preferably an electro-magnetic actuator.
  • the actuator unit 36 comprises, for example, an armature 22.
  • the actuator unit 36 comprises a coil 38, which is preferably arranged inside the housing 16 and overmolded.
  • a core may be assigned to the actuator unit 36.
  • the coil 38 and the core form an electromagnet.
  • the core is mainly formed by at least a part of the inlet tube 12.
  • the armature 22, the housing 16 and the valve body 14 are affected by a magnetic field induced by the activated coil 38.
  • the actuator unit 36 and the other elements guiding and/or amplifying the magnetic field induced by the coil 38 form an electro-magnetic circuit.
  • An electrical behaviour of this electro-magnetic circuit can be characterized by an actuator unit voltage.
  • the actuator unit voltage can be measured by a voltage sensor.
  • the electromagnet may effect, depending on the activation signal, an electro-magnetic force on the armature 22.
  • the armature 22 may be attracted by the electromagnet and moves in the direction of the longitudinal axis L away from a fluid outlet.
  • the armature 22 pushes on the upper guide 24, which is mechanically coupled with the valve needle 20 and therefore the valve needle 20 moves in axial direction out of the closing position.
  • Figure 2 shows a diagram of an actuator unit voltage characteristic Uc during the activation period Ti and the transient phase T_phase.
  • the actuator unit 36 is activated according to a predetermined activation signal with a given activation period Ti for effecting a fluid flow out of the injection nozzle.
  • the actuator unit 36 for instance, comprises actuator unit control pins.
  • the activation signal may be applied to these control pins.
  • the actuator unit voltage can, e. g., be measured on these control pins by sampling the actuator unit voltage with given sampling instances.
  • a variation of the armature dynamic which happens in a moment the valve needle 20 reaches the closing position, can be detected depending on a the actuator unit voltage characteristic Uc.
  • the actuator unit voltage characteristic is captured at least over a period of time during the valve needle could reach the closing position.
  • the actuator unit voltage may be captured during the activation period Ti and the transient phase T_phase.
  • actuator unit voltage may be captured only during the transient phase T_phase.
  • the captured actuator unit voltage characteristic Uc may be noisy, because of a system noise and/or noise from external sources.
  • a filter procedure for instance according equation 1, may be applied several times until the high frequency signal parts typically for noise disappear.
  • the smoothing filter may be a linear smoothing filter which is designed to determine for a respective value of the captured actuator unit voltage characteristic or a pre-processed actuator unit voltage characteristic a weighted average value depending on the value itself and a given second number of respective previous and subsequent values.
  • a non-linear smoothing filter may be applied. In the case the filter procedure is performed several times, also different smoothing filter types may be used.
  • the diagrams of Figure 3b and 3c show a part of the transient phase T_phase.
  • the valve needle 20 reaching the closing position by contacting the seat causes a change in the dynamic behaviour of the armature 22. This change can be detected depending on the, in particular, smoothed injector voltage Us.
  • a first zero crossing of the second temporal derivative of the smoothed actuator unit voltage characteristic Us" characterizes the time the valve needle 20 reaches the closing position.
  • the closing time t_close may be determined in correlation with the first zero crossing of the second temporal derivate of the smoothed actuator unit voltage characteristic Us".

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP10191465A 2010-11-17 2010-11-17 Procédé et dispositif de commande d'une soupape d'injection Withdrawn EP2455600A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10191465A EP2455600A1 (fr) 2010-11-17 2010-11-17 Procédé et dispositif de commande d'une soupape d'injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10191465A EP2455600A1 (fr) 2010-11-17 2010-11-17 Procédé et dispositif de commande d'une soupape d'injection

Publications (1)

Publication Number Publication Date
EP2455600A1 true EP2455600A1 (fr) 2012-05-23

Family

ID=43827761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10191465A Withdrawn EP2455600A1 (fr) 2010-11-17 2010-11-17 Procédé et dispositif de commande d'une soupape d'injection

Country Status (1)

Country Link
EP (1) EP2455600A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140000564A1 (en) * 2012-06-27 2014-01-02 GM Global Technology Operations LLC Fuel injector closing timing adjustment systems and methods
WO2016062494A1 (fr) * 2014-10-21 2016-04-28 Robert Bosch Gmbh Dispositif pour assurer la commande d'au moins une soupape commutable
WO2016091848A1 (fr) * 2014-12-09 2016-06-16 Delphi International Operations Luxembourg S.À R.L. Commande d'injection de carburant dans un moteur à combustion interne
EP2990705A4 (fr) * 2013-04-26 2016-12-21 Hitachi Automotive Systems Ltd Unité de commande de vanne électromagnétique et dispositif de commande de moteur à combustion interne utilisant celle-ci
US10808640B2 (en) 2016-05-31 2020-10-20 Continental Automotive France Method for detecting malfunction of a software solution for estimating the instant of interruption of fuel injection of an internal combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994013991A1 (fr) * 1992-12-08 1994-06-23 Pi Research Ltd. Electrovannes
US20020130192A1 (en) * 2001-03-15 2002-09-19 Siemens Vdo Automotive Corporation End of valve motion detection for a spool control valve
DE102008041528A1 (de) * 2008-08-25 2010-03-04 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoff-Einspritzvorrichtung
DE102009002483A1 (de) * 2009-04-20 2010-10-21 Robert Bosch Gmbh Verfahren zum Betreiben eines Einspritzventils
WO2010133414A1 (fr) * 2009-05-19 2010-11-25 Robert Bosch Gmbh Procédé de détection d'un état de fonctionnement d'une soupape d'injection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994013991A1 (fr) * 1992-12-08 1994-06-23 Pi Research Ltd. Electrovannes
US20020130192A1 (en) * 2001-03-15 2002-09-19 Siemens Vdo Automotive Corporation End of valve motion detection for a spool control valve
DE102008041528A1 (de) * 2008-08-25 2010-03-04 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoff-Einspritzvorrichtung
DE102009002483A1 (de) * 2009-04-20 2010-10-21 Robert Bosch Gmbh Verfahren zum Betreiben eines Einspritzventils
WO2010133414A1 (fr) * 2009-05-19 2010-11-25 Robert Bosch Gmbh Procédé de détection d'un état de fonctionnement d'une soupape d'injection

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140000564A1 (en) * 2012-06-27 2014-01-02 GM Global Technology Operations LLC Fuel injector closing timing adjustment systems and methods
CN103511105A (zh) * 2012-06-27 2014-01-15 通用汽车环球科技运作有限责任公司 燃料喷射器关闭正时调节系统和方法
US9074552B2 (en) * 2012-06-27 2015-07-07 GM Global Technology Operations LLC Fuel injector closing timing adjustment systems and methods
DE102013211926B4 (de) 2012-06-27 2018-12-13 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Verfahren zum Einstellen eines Schliesszeitpunkts einer Kraftstoffeinspritzeinrichtung
CN103511105B (zh) * 2012-06-27 2016-05-11 通用汽车环球科技运作有限责任公司 燃料喷射器关闭正时调节系统和方法
EP2990705A4 (fr) * 2013-04-26 2016-12-21 Hitachi Automotive Systems Ltd Unité de commande de vanne électromagnétique et dispositif de commande de moteur à combustion interne utilisant celle-ci
US10240551B2 (en) 2013-04-26 2019-03-26 Hitachi Automotive Systems, Ltd. Electromagnetic valve control unit and internal combustion engine control device using same
US11300070B2 (en) 2013-04-26 2022-04-12 Hitachi Astemo, Ltd. Electromagnetic valve control unit and internal combustion engine control device using same
CN107076047A (zh) * 2014-10-21 2017-08-18 罗伯特·博世有限公司 用于对至少一个能够开关的阀进行控制的装置
JP2018500508A (ja) * 2014-10-21 2018-01-11 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ スイッチング可能な少なくとも１つの弁を制御するための装置
WO2016062494A1 (fr) * 2014-10-21 2016-04-28 Robert Bosch Gmbh Dispositif pour assurer la commande d'au moins une soupape commutable
WO2016091848A1 (fr) * 2014-12-09 2016-06-16 Delphi International Operations Luxembourg S.À R.L. Commande d'injection de carburant dans un moteur à combustion interne
US10808640B2 (en) 2016-05-31 2020-10-20 Continental Automotive France Method for detecting malfunction of a software solution for estimating the instant of interruption of fuel injection of an internal combustion engine

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